Always remember that our country has an Exchange Regime, something unique worldwide.
Although it is not always the solution, you should ask your family member to inform the bank, Western Union or other operator you use to transfer money to Colombia, that this money is your wages and that you are sending it to Colombia for your expenses and those of your family even if it is for social security payments. There is a specific report for this.
If the amount is higher because you are sending money to buy real estate, report it as such.
When the proper exchange reporting codes are used, you are less likely to be called to declare in Colombia. Likewise, your family member may claim that these remittances are not his or her own income and thus not be liable for taxes on these remittances, although he or she will still have to file a tax return.